It Worked :) Thank you both for the guidance.
Here's the final result in case it will help anyone else http://dpaste.com/278230/ On Nov 21, 5:09 pm, Carlos Daniel Ruvalcaba Valenzuela <clsdan...@gmail.com> wrote: > The first error is simple, university models is defined after your > department model, thus is not found, you can define the foreign key as > a string in the form of "appname.ModelName", so you will define it > like this: > > class departments(models.Model): > university = models.ForeignKey("appname.university", > related_name="departments") > > Where appname is the name of the application where the models are > being defined (the folder where models.py is stored). > > About the other problem, it would be good to have a little more > context on what is socialmediacourses and where is throwing you the > error, but with the above change should do the trick, just don't > forget to remove your ManyToMany departments definition on University > model, that would make the name university.department clash. > > Regards, > Carlos Ruvalcaba > > > > On Sun, Nov 21, 2010 at 7:10 AM, Bruno Amaral <m...@brunoamaral.eu> wrote: > > Carlos, Thank you for this! > > > Your solution is what I am looking for,but for some reason I get an > > error message: > > "NameError: name 'university' is not defined" <http://dpaste.com/ > > 278024/> > > > Figuring this could an issue with Python and not Django, i added > > university ='' to the top. > > > The validate command returned the message: > > Error: One or more models did not validate: > > socialmediacourses.departments: 'university' has a relation with > > model , which has either not been installed or is abstract. > > socialmediacourses.university: Reverse query name for m2m field > > 'departments' clashes with field 'departments.university'. Add a > > related_name argument to the definition for 'departments'. > > > what am I doing wrong? > > > On Nov 21, 4:23 am, Carlos Daniel Ruvalcaba Valenzuela > > <clsdan...@gmail.com> wrote: > >> Depends on you requirements, you could have used a Foreign Key to the > >> University on the Department model and marking it as required, thus > >> there cannot be a Department without university and set the > >> related_name property on the ForeignKey to the "departments" so you > >> can access University.departments property for the list of > >> departments. > > >> You may not want this if you only want to have 1 kind of department > >> which will be linked to many universities, but I see this may not be > >> the case, thus your models may end like this: > > >> class departments(models.Model): > > >> GENDER = ((u'M', u'Male'),(u'F', u'Female'),) > > >> university = models.ForeignKey(university, > >> related_name="departments") > >> name = models.CharField(max_length=60) > >> head_name = models.CharField(max_length=60) > >> head_email = models.EmailField(max_length=60) > >> head_gender = models.CharField(max_length=2, choices=GENDER) > > >> Regards, > >> Carlos Ruvalcaba > > >> On Sat, Nov 20, 2010 at 6:19 PM, Bruno Amaral <m...@brunoamaral.eu> wrote: > >> > I have been trying to create a database for Universities, Departments > >> > and Courses. > > >> > The idea is that a University has many departments, which in turn have > >> > one or more courses. > > >> > So far, this model works:http://dpaste.com/277850/ > > >> > With one caveat, it allows a department to exist without a University > >> > linked to it. > > >> > I am at a loss here, even after reading over all the documentation I > >> > could find on the website, does anyone have an idea on what I am doing > >> > wrong, or where I should look for a solution? > > >> > -- > >> > You received this message because you are subscribed to the Google > >> > Groups "Django users" group. > >> > To post to this group, send email to django-us...@googlegroups.com. > >> > To unsubscribe from this group, send email to > >> > django-users+unsubscr...@googlegroups.com. > >> > For more options, visit this group > >> > athttp://groups.google.com/group/django-users?hl=en. > > > -- > > You received this message because you are subscribed to the Google Groups > > "Django users" group. > > To post to this group, send email to django-us...@googlegroups.com. > > To unsubscribe from this group, send email to > > django-users+unsubscr...@googlegroups.com. > > For more options, visit this group > > athttp://groups.google.com/group/django-users?hl=en. -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
